垃圾渗滤液脱氮新方法综述

有效去除垃圾渗滤液中的氮是一项艰巨的任务,传统的先硝化后反硝化处理方法存在的主要问题是反硝化阶段碳源不足和总氮去除效率过低。研究中研究人员提出了好氧反硝化、厌氧氨氧化和短程硝化反硝化等新方法。好氧反硝化菌可以利用硝化过程中充足的碳源进行反硝化;厌氧氨氧化是在缺氧条件下,以NO-2为电子受体,直接把氨氧化成N2;短程硝化反硝化将脱氮过程控制在亚硝化阶段,不但节省了反硝化过程中的碳源,而且减少了能量的消耗。本文对这些方法及其在实践的应用进行了论述。

Summarization of New Ways for Nitrogen Removal in Landfill Leachate

It is a difficult task to remove nitrogen in the landfill leachate effectively.The main defects of traditional ways,which are nitrification and denitrification,are the lack of carbon source during the denitrification and low efficieny of TN removal.Recent years,people found aerobic denitrification,anaerobic ammonium oxidation(ANAMMOX)and nitrification/denitrification via nitrite.In the process of aerobic denitrification,there are enough carbon sources for denitrification.In the process of ANAMMOX,ammonium is converted to nitrogen gas under anoxic conditions with nitrite as the electron acceptor.Nitrification/denitrification via nitrite can save lots of carbon sources and energy.This paper introduces these new ways and their application in nitrogen removeal.